Fig. 5
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WISE color-color diagram displaying the expected locus for Class I and Class II sources as proposed by Koenig & Leisawitz (2014). Confirmed members (blue ⋆) have P ≥ 50%, while possible members (green +) have P < 50%. The remaining AllWISE objects (grey dots) are not present in the Gaia EDR3 catalogue. The IR sources found in the Classes I and II boxes are considered here as additional candidates.
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